Claude Opus 4.5
READER SUMMARYFrontier model for coding, computer use, long-running tools, and coordinated multi-agent workflows.
Why this model scores 72.1
Strong agentic and computer-use capability with broad cloud and API access is counterbalanced by improved alignment and measured prompt-injection defenses.
News tied to Claude Opus 4.5
The model score of 72.1 rates this model's risk profile. The overall Doom Index of 62.1 measures the recalibrated complete evidence corpus. These values answer different questions.
Each article's leave-one-out Doom Index contribution is divided equally among the exact models named on that article. This prevents multi-model evidence from being claimed in full on several model pages. Model risk scores are recalculated from their technical profile and related news, but never feed back into the overall index.
Anthropic deploys stronger browser-agent prompt-injection defenses
Anthropic combined Claude Opus 4.5 training, content classifiers, intervention logic, and continuous red teaming to reduce adaptive prompt-injection attack success to about one percent and expanded Claude for Chrome to beta.
- Full item contribution
- -0.20
- Claude Opus 4.5 equal share
- -0.20
Claude Opus 4.5 expands long-running agents and computer use
Anthropic released Claude Opus 4.5 across its apps, API, and major clouds with stronger coding, computer use, tool orchestration, multi-agent coordination, and longer-running workflows.
- Full item contribution
- +0.10
- Claude Opus 4.5 equal share
- +0.10
Model score history
- R1Doom Score 72.1
New exact model profile from dated launch, system card, and deployed safeguard report.
11 Aug 2026